51 lines
1.3 KiB
ArmAsm
51 lines
1.3 KiB
ArmAsm
/* crt0.S -- startup file for moxie
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*
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* Copyright (c) 2008, 2009 Anthony Green
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice is included verbatim in any distributions. No written agreement,
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* license, or royalty fee is required for any of the authorized uses.
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* Modifications to this software may be copyrighted by their authors
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* and need not follow the licensing terms described here, provided that
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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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*/
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.globl __start
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.weak _start
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.text
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.type __start,@function
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__start:
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_start:
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ldi.l $sp, _stack /* load up stack pointer */
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ldi.l $fp, 0x0 /* zero fp to allow unwinders to stop */
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/* zero the bss area */
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dec $sp, 12
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ldi.l $r0, __bss_start__
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ldi.l $r1, __bss_end__
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sub.l $r1, $r0
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sto.l 8($sp), $r1
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ldi.l $r1, 0
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jsra memset
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inc $sp, 12
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/* Call _init to invoke static constructors, etc. */
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jsra _init
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/* Call _fini at exit time for static destructors. */
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ldi.l $r0, _fini
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jsra atexit
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/* Set argc and argv. These are populated by the simulator. */
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lda.l $r0, 0x4
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ldi.l $r1, 0x8
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jsra main
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jsra exit
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.Lend:
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.size __start,(.Lend-__start)
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